Session 4: Sound effects system with Web Audio API

dev-journal.md

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+---
+
+### Session 4 - 2026-08-20 (Morning)
+**Status:** ✅ Sound Effects System Added
+
+#### What was done:
+- Created complete audio system using Web Audio API (no external assets needed)
+- Added click sound effect (rising C-major arpeggio on each harvest)
+- Added purchase sound effect (descending chime when buying buildings)
+- Added achievement fanfare (ascending chord progression on unlock)
+- Integrated audio into game.js, achievements.js, and index.html
+- Audio context auto-initializes on game start; browsers handle suspension automatically
+
+#### Files modified/created:
+- `js/audio.js` - New file with Audio system (click, purchase, achievement sounds via Web Audio API)
+- `js/game.js` - Added Audio.init() in init(), Audio.playClick() in harvest(), Audio.playPurchase() in buyBuilding()
+- `js/achievements.js` - Added Audio.playAchievement() on achievement unlock
+- `index.html` - Added audio.js script tag
+
+#### Next goals:
+- Mobile touch optimizations (tap feedback, responsive layout)
+- Prestige/reset system with bonuses
+- Consider adding more sound variations or music
+
+---
+
 *Journal auto-updated by Hermes Agent cron job (every 8 hours)*